Brake caliper housing for friction stir welding

Abstract

A brake caliper housing includes a left shell having a left connecting surface, and a right shell having a right connecting surface. The left connecting surface has at least one positioning hole, and the right connecting surface protrudes with at least one positioning pin inserted into the at least one positioning hole, such that the left connecting surface is abutted against and aligned with the right connecting surface. The right connecting surface is fixedly connected with the left connecting surface by a friction stir welding. As a result, during the friction stir welding, the left and right shells can be precisely aligned and joined together.

What is claimed is: 
     
         1 . A brake caliper housing, comprising:
 a left shell having a left connecting surface; and   a right shell having a right connecting surface;   wherein the left connecting surface has at least one positioning hole, the right connecting surface protrudes with at least one positioning pin, and the at least one positioning pin is inserted into the at least one positioning hole, such that the left connecting surface is abutted against and aligned with the right connecting surface;   wherein the right connecting surface is fixedly connected with the left connecting surface by a friction stir welding.   
     
     
         2 . The brake caliper housing as claimed in  claim 1 , wherein the right connecting surface has at least one positioning hole, and the at least one positioning pin is inserted into the at least one positioning hole of the right connecting surface in a way that the at least one positioning pin protrudes from the right connecting surface. 
     
     
         3 . The brake caliper housing as claimed in  claim 1 , wherein the right shell is monolithically formed with the at least one positioning pin. 
     
     
         4 . The brake caliper housing as claimed in  claim 1 , wherein:
 the left shell comprises a main body, a front extension segment extending from a top edge of the main body toward the right shell, and a rear extension segment extending from the top edge of the main body toward the right shell and being spaced from the front extension segment; the front extension segment has an end face facing the right shell, and the rear extension segment has an end face facing the right shell; the end faces of the front and rear extension segments collectively form the left connecting surface; and   the right shell comprises a main body, a front extension segment extending from a top edge of the main body of the right shell toward the left shell, and a rear extension segment extending from the top edge of the main body of the right shell toward the left shell and being spaced from the front extension segment of the right shell; the front extension segment of the right shell has an end face facing the left shell, and the rear extension segment of the right shell has an end face facing the left shell; the end faces of the front and rear extension segments of the right shell collectively form the right connecting surface.   
     
     
         5 . The brake caliper housing as claimed in  claim 4 , wherein the left shell comprises a mounting protrusion protruding in a direction away from the right shell, and the right shell comprises a mounting protrusion protruding in a direction away from the left shell. 
     
     
         6 . The brake caliper housing as claimed in  claim 5 , wherein the main body of the left shell comprises a bottom edge; the mounting protrusion of the left shell has a top edge lower than the top edge of the main body of the left shell; the top edge of the mounting protrusion of the left shell and the bottom edge of the main body of the left shell respectively form holding surfaces to be clamped by a fixture. 
     
     
         7 . The brake caliper housing as claimed in  claim 6 , wherein the main body of the right shell comprises a bottom edge; the mounting protrusion of the right shell has a top edge lower than the top edge of the main body of the right shell; the top edge of the mounting protrusion of the right shell and the bottom edge of the main body of the right shell respectively form holding surfaces to be clamped by the fixture. 
     
     
         8 . The brake caliper housing as claimed in  claim 1 , wherein the left shell comprises a mounting protrusion protruding in a direction away from the right shell, and the right shell comprises a mounting protrusion protruding in a direction away from the left shell. 
     
     
         9 . The brake caliper housing as claimed in  claim 8 , wherein the left shell comprises a main body having a top edge and a bottom edge; the mounting protrusion of the left shell has a top edge lower than the top edge of the main body of the left shell; the top edge of the mounting protrusion of the left shell and the bottom edge of the main body of the left shell respectively form holding surfaces to be clamped by a fixture. 
     
     
         10 . The brake caliper housing as claimed in  claim 9 , wherein the right shell comprises a main body having a top edge and a bottom edge; the mounting protrusion of the right shell has a top edge lower than the top edge of the main body of the right shell; the top edge of the mounting protrusion of the right shell and the bottom edge of the main body of the right shell respectively form holding surfaces to be clamped by the fixture.